Drinking at a completely inappropriate time or in an innappropriate place, such as during class, at a funeral, in the library, during a sports match (if you are playing) nine in the morning during finals week.
This term is a reference to the Denison University Hilltoppers, the men's acappella group (who are notorious for drinking in innapropriate occasions), but honestly a good percentage of the campus is equally guilty. Plus, we love them so, so it's okay. Sort of.
Dan: Dude, did you see the kids who were wasted at the chamber orchestra recital?

Tom: Yeah, the whole string section was off. They were totally hilltopping.
by Alison Costello December 14, 2011
Get the Hilltopping neck gaiter and mug.
v., coll.; to get drunk on a Sunday night, or, more loosely, at any time when being intoxicated is completely uncalled for. Its origin is unknown.
Joe: "Dude, you nearly fell over that chair! Are you wasted?"
Dale: "Yeah mane, I decided to hilltop tonight bro." (vomits)
by Col. Hans Landa October 23, 2011
Get a to hilltop mug for your Aunt Zora.
A ghetto neighborhood in Tacoma known for gangs,drugs, high crime, and shootings. Its located near downtown Tacoma. Tacoma is 20 miles south of Seattle.
some guy just got shot in Tacoma

must of been in hilltop
by left coast killa September 02, 2008
Get a Hilltop mug for your cousin Rihanna.
Trent isn't special he's hilltop, that puts special to shame.
by Solid Mantis June 15, 2018
Get a Hilltop mug for your dog Paul.
People who are hilltop are better at life than people who are failures.
Those two are so hilltop, that must be why they're better than me at life.
by Solid Mantis June 15, 2018
Get the Hilltop neck gaiter and mug.
A midget on a hilltop can see further than the wrestlers that tower over the tall people you know and hate.
Mini me is hilltop and heir to the life you could never live.
by Solid Mantis June 15, 2018
Get the Hilltop neck gaiter and mug.